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HowShorted

CHI short interest Nasdaq Global Market

Calamos Convertible Opportunit. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: an SEC filer exists but no defensible share count is available yet.

Shares short
491,682
vs previous settlement
โˆ’172,094 (-25.9%)
days to cover
3.33
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for CHI shares short

Days to cover

FINRA's own figure: reported shares short divided by the security's average daily trading volume, published alongside each settlement.

Aggregate net short position time series for CHI days to cover

Fails to deliver

The SEC's fails-to-deliver figure for CHI: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Latest balance
6,078
14 Sep 2026
Highest in window
51,557
12 Mar 2026
Days with a balance
73
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Calamos Convertible Opportunit fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 52K shares.

History

Every FINRA settlement we hold for CHI, newest first. สณ marks a figure FINRA itself flagged as revised.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026491,682โˆ’172,0943.33
31 Aug 2026663,776+94,3115.22
14 Aug 2026569,465+60,6663.97
31 Jul 2026508,799+91,7612.80
15 Jul 2026417,038+89,0142.42
30 Jun 2026328,024+57,5351.51
15 Jun 2026270,489+39,0351.88
29 May 2026231,454+34,2731.43
15 May 2026197,181โˆ’141,9451.12
30 Apr 2026339,126โˆ’23,1341.99
15 Apr 2026362,260โˆ’73,5311.49
31 Mar 2026435,791+30,9342.26
13 Mar 2026404,857+36,5602.09
27 Feb 2026368,297โˆ’30,4032.10
13 Feb 2026398,700+116,6071.90
30 Jan 2026282,093+55,3311.50
15 Jan 2026226,762+22,4101.11
31 Dec 2025204,352โˆ’14,1631.02
15 Dec 2025218,515โˆ’79,2241.19
28 Nov 2025297,739โˆ’58,4101.55
14 Nov 2025356,149โˆ’103,9231.53
31 Oct 2025460,072+180,5222.54
15 Oct 2025279,550+19,6721.18
30 Sep 2025259,878โˆ’6,7471.18
15 Sep 2025266,625+41,5471.29
29 Aug 2025225,078+15,2551.29
15 Aug 2025209,823+24,0621.42
31 Jul 2025185,761โˆ’26,4811.23
15 Jul 2025212,242โˆ’33,9911.42
30 Jun 2025246,233โˆ’45,5991.29
13 Jun 2025291,832โˆ’107,2691.60
30 May 2025399,101โˆ’13,3771.43
15 May 2025412,478โˆ’287,1021.86
30 Apr 2025699,580+445,2433.27
15 Apr 2025254,337+103,8081.00
31 Mar 2025150,529+57,4571.00
14 Mar 202593,072+2,6271.00
28 Feb 202590,445โˆ’25,5411.00
14 Feb 2025115,986โˆ’94,1021.00
31 Jan 2025210,088โˆ’38,9931.57
15 Jan 2025249,081โˆ’149,3661.06
31 Dec 2024398,447+187,7442.61
13 Dec 2024210,703+24,2151.71
29 Nov 2024186,488โˆ’28,8121.51
15 Nov 2024215,300โˆ’20,1901.81
31 Oct 2024235,490โˆ’43,0671.92
15 Oct 2024278,557โˆ’43,6031.97
30 Sep 2024322,160โˆ’47,0922.21
13 Sep 2024369,252+10,6083.18
30 Aug 2024358,644โˆ’44,3272.97
15 Aug 2024402,971โˆ’109,6332.89
31 Jul 2024512,604โˆ’169,4443.10
15 Jul 2024682,048โˆ’23,0035.28
28 Jun 2024705,051โˆ’112,1784.57
14 Jun 2024817,229โˆ’160,5664.55
31 May 2024977,795+334,5654.43
15 May 2024643,230+123,9324.81
30 Apr 2024519,298+215,3773.46
15 Apr 2024303,921โˆ’55,0361.65
28 Mar 2024358,957+243,7321.52
15 Mar 2024115,225โˆ’104,5841.00
29 Feb 2024219,809+112,2771.33
15 Feb 2024107,532+70,1021.00
31 Jan 202437,430+25,6481.00
12 Jan 202411,782+4,6991.00
29 Dec 20237,083โˆ’16,5951.00
15 Dec 202323,678โˆ’4,0721.00
30 Nov 202327,750โˆ’61,0731.00
15 Nov 202388,823โˆ’117,7931.00
31 Oct 2023206,616โˆ’88,0361.54
13 Oct 2023294,652+206,0281.73
29 Sep 202388,624+9,3401.00
15 Sep 202379,284+8,3681.00
31 Aug 202370,916โˆ’41,1191.00
15 Aug 2023112,035+43,9561.11
31 Jul 202368,079โˆ’43,5951.00
14 Jul 2023111,674โˆ’76,2581.00
30 Jun 2023187,932+58,7161.46
15 Jun 2023129,216+29,0361.00
31 May 2023100,180โˆ’17,9231.00
15 May 2023118,103+36,0951.08
28 Apr 202382,008+17,9061.00
14 Apr 202364,102+2,3541.00
31 Mar 202361,748โˆ’124,8411.00
15 Mar 2023186,589โˆ’96,4061.06
28 Feb 2023282,995+144,0131.42
15 Feb 2023138,982โˆ’90,6191.00
31 Jan 2023229,601+147,3051.23
13 Jan 202382,296โˆ’186,1961.00
30 Dec 2022268,492+213,4031.29
15 Dec 202255,089โˆ’91,9111.00
30 Nov 2022147,000+4,1791.07
15 Nov 2022142,821+41,5321.00
31 Oct 2022101,289+71,3291.00
14 Oct 202229,960โˆ’4,3101.00
30 Sep 202234,270โˆ’50,2791.00
15 Sep 202284,549โˆ’51,8351.00
31 Aug 2022136,384โˆ’41,1051.00
15 Aug 2022177,489โˆ’247,6191.00
29 Jul 2022425,108+129,6643.06
15 Jul 2022295,444+95,5652.44
30 Jun 2022199,879+14,9771.01
15 Jun 2022184,902โˆ’122,8051.00
31 May 2022307,707+134,4281.36
13 May 2022173,279โˆ’62,3191.00
29 Apr 2022235,598+152,2291.21
14 Apr 202283,369+45,5841.00
31 Mar 202237,785+26,3171.00
15 Mar 202211,468+1,7751.00
28 Feb 20229,693โˆ’69,7041.00
15 Feb 202279,397+37,6921.00
31 Jan 202241,705โˆ’35,5231.00
14 Jan 202277,228+28,9731.00
31 Dec 202148,255โˆ’40,8091.00
15 Dec 202189,064โˆ’17,1531.00
30 Nov 2021106,217โˆ’42,3221.00
15 Nov 2021148,539โˆ’46,1481.14
29 Oct 2021194,687+3,5321.43
15 Oct 2021191,155+8,5701.39
30 Sep 2021182,585โˆ’6,1371.20
15 Sep 2021188,722โˆ’22,6421.53
31 Aug 2021211,364โˆ’85,9961.70
13 Aug 2021297,360+40,4562.23
30 Jul 2021256,904+57,4381.55
15 Jul 2021199,466+81,5471.35
30 Jun 2021117,919+11,1801.00
15 Jun 2021106,739สณ+43,5621.00
28 May 202163,177โˆ’55,3321.00
14 May 2021118,509โˆ’24,2821.00
30 Apr 2021142,791โˆ’66,2941.00
15 Apr 2021209,085+97,6331.00
31 Mar 2021111,452+30,3201.00
15 Mar 202181,132+47,6241.00
26 Feb 202133,508โˆ’15,7261.00
12 Feb 202149,234+41,6341.00
29 Jan 20217,600โˆ’2,8901.00
15 Jan 202110,490โˆ’12,6691.00
31 Dec 202023,159+7,2741.00
15 Dec 202015,885โˆ’7,8341.00
30 Nov 202023,719+8,3391.00
13 Nov 202015,380โˆ’17,5161.00
30 Oct 202032,896โˆ’8661.00
15 Oct 202033,762+22,2071.00
30 Sep 202011,555+5,6281.00
15 Sep 20205,927โˆ’14,2441.00
31 Aug 202020,171+9,2521.00
14 Aug 202010,919+4,8311.00
31 Jul 20206,088โˆ’8,1851.00
15 Jul 202014,273+13,1351.00
30 Jun 20201,138โˆ’26,7291.00
15 Jun 202027,867โˆ’74,6111.00
29 May 2020102,478+48,8931.00
15 May 202053,585โˆ’13,3081.00
30 Apr 202066,893โˆ’1,5581.00
15 Apr 202068,451โˆ’38,3611.00
31 Mar 2020106,812+73,8001.00
13 Mar 202033,012โˆ’9,1711.00
28 Feb 202042,183+19,3011.00
14 Feb 202022,882+6,9421.00
31 Jan 202015,940โˆ’58,4891.00
15 Jan 202074,429โˆ’35,1541.00
31 Dec 2019109,583โˆ’129,5591.00
13 Dec 2019239,142โˆ’63,7661.90
29 Nov 2019302,908+20,1052.33
15 Nov 2019282,803โˆ’42,6211.87
31 Oct 2019325,424+195,3352.02
15 Oct 2019130,089+64,6191.00
30 Sep 201965,470+27,2711.00
13 Sep 201938,199โˆ’31,2471.00
30 Aug 201969,446+54,8771.00
15 Aug 201914,569โˆ’48,4011.00
31 Jul 201962,970+31,6031.00
15 Jul 201931,367โˆ’24,6071.00
28 Jun 201955,974โˆ’31,5001.00
14 Jun 201987,474โˆ’48,6791.00
31 May 2019136,153โˆ’32,0641.00
15 May 2019168,217+7,1141.00
30 Apr 2019161,103+26,0231.00
15 Apr 2019135,080+68,1621.00
29 Mar 201966,918โˆ’8,2551.00
15 Mar 201975,173+56,0491.00
28 Feb 201919,124+9591.00
15 Feb 201918,165โˆ’65,0301.00
31 Jan 201983,195+66,2391.00
15 Jan 201916,956โˆ’63,6551.00
31 Dec 201880,611โˆ’36,3771.00
14 Dec 2018116,988โˆ’30,4271.00
30 Nov 2018147,415โˆ’57,2251.00
15 Nov 2018204,640โˆ’116,2511.00
31 Oct 2018320,891โˆ’148,1801.13
15 Oct 2018469,071โˆ’224,7321.00
28 Sep 2018693,803โˆ’342,1052.09
14 Sep 20181,035,908+25,9075.17
31 Aug 20181,010,001+61,8336.06
15 Aug 2018948,168โˆ’19,8284.43
31 Jul 2018967,996+155,3144.61
13 Jul 2018812,682โˆ’64,5623.79
29 Jun 2018877,244+141,4253.99
15 Jun 2018735,819+25,7584.48
31 May 2018710,061+108,1154.26
15 May 2018601,946+5,3863.04
30 Apr 2018596,560+167,0263.18
13 Apr 2018429,534+256,6052.15
29 Mar 2018172,929+101,1781.00
15 Mar 201871,751โˆ’26,0801.00
28 Feb 201897,831+7,7601.00
15 Feb 201890,071+5,3271.00
31 Jan 201884,744+75,1851.00
12 Jan 20189,559โˆ’732,2961.00
29 Dec 2017741,855โ€“2.21

Scroll inside the table for earlier settlements, back to 29 Dec 2017.

Questions

Frequently asked questions

What is CHI's short interest?
491,682 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 172,094 from the previous settlement.
Why is there no percentage for CHI?
Because no defensible share count exists to divide by: an SEC filer exists but no defensible share count is available yet. The symbol maps to an SEC filer, but its share count cannot be used yet. A newly listed company needs two cover-page counts on file before the first is trusted; a split or an unexplained jump pauses publication until a fresh SEC count corroborates it; a secondary share class publishes under the company's primary line; and a foreign filer's short count is in depositary-share units. This page upgrades to a percentage automatically once a defensible count exists.
What is CHI's days to cover?
3.33 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume, published in the same file and shown verbatim. We hold no volume data ourselves.
Is this the short float?
No. This page shows FINRA's share count only. Short float divides that count by the public float, and short interest as we publish it elsewhere divides it by shares outstanding from SEC filings. Neither denominator is available for this line, so neither ratio is shown.
How often does this update?
FINRA member firms report short positions as of the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. We ingest each file the day it appears and re-read recent settlements for revisions.

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